C++ Builder 10.2 Tokyo > FindComponent()한 결과를 TEdit *에 넣는 경우 > dynamic_cast와 (TEdit *)캐스트의 차이

RAD Studio 10.2 Tokyo Update 3
Windows 10 Pro (64bit) バージョン 1803 (April 2018 Update)

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code

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
    TEdit *edPtr;
    String msg = L"";

    // 1. dynamic_cast
    edPtr = dynamic_cast<TEdit*>(FindComponent("Edit1"));
    if (edPtr != NULL) {
        msg += L"1a: Edit1(dynamic_cast): Exist\r\n";
    }

    edPtr = dynamic_cast<TEdit*>(FindComponent("CheckBox1"));
    if (edPtr != NULL) {
        msg += L"1b: CheckBox1(dynamic_cast): Exist\r\n";
    }

    // 2. TEdit * cast
    edPtr = (TEdit *)(FindComponent("Edit1"));
    if (edPtr != NULL) {
        msg += L"2a: Edit1(TEdit * cast): Exist\r\n";
    }

    edPtr = (TEdit *)(FindComponent("CheckBox1"));
    if (edPtr != NULL) {
        msg += L"2b: CheckBox1(TEdit * cast): Exist\r\n";
    }

    ShowMessage(msg.c_str());

}
//---------------------------------------------------------------------------

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